Raised in the rural town of Mansfield, Victoria,[1] Bergmoser completed his master's degree in screenwriting at the Victorian College of the Arts.

[2] Bergmoser won the Sir Peter Ustinov Television Scriptwriting Award in 2015 for his screenplay Windmills.

A negative review in The Sydney Morning Herald said that Bergmoser had "a bright future", but criticized the script for failing to meet its potential and "engage critically with our censorious present [...] flashes of Wildean wit are few and far between, and precise expression sometimes eludes [Bergmoser].

The first of the books and Bergmoser's debut adult novel, The Hunted, was released in Australia in April 2020 to positive reviews.

[6][7] In 2022, Bergmoser was reported by Variety to be attached to write the script of Vertigo Entertainment's adaptation of the survival horror webtoon GremoryLand.